<div id="explanations" style="margin: 40px 10px 10px 40px ">
<%  if @explanations.size !=0 %>
<% @explanations.each do |e|%>
<%=e.description%> &nbsp;&nbsp;&nbsp;&nbsp;
<a href="/surveys/prof_surveys/del_expl/<%=e.id%>" >删除</a>  <br/>
<% end %>
<% else %>
还没有阿
<% end %>
</div>
<div id="add_expl">
<a href="/surveys/prof_surveys/new_expl/<%=params[:id]%>" >添加</a>
</div>
